Sheet glass drawing mechanism



H. P. CALLARD.

SHEET G DRAWING MECHANISM.

APPLICATION men .n, 1919. RENEWED MAY 31,1921.

1 ,402,145, Patented Jan. 3, 1922 4 SHEETS-SHEET I.

' M W MQMM R. P. CALLARD.

SHEET GLASS DRAWING MECHANISM AP ucmon FILED AUG-1|.9f9. RENEWED MAY 31.1921.

' Patented Jan. 3, 1922.

4 SHEETSSHEET 2 H [ravennoz' are-M win/.4. Wm M Am R. P. CALLARD. FSHEET GLASS DRAWING MECHANISM. APPLICATWN FILED MIGJI. ms. uneven IAY 31. 1921. 1,402,145.

1 mm Jan. 3,1922,

l SHEETS-SHEET 4.

umrso STATES PATENT OFFICE.

assrenos. To run LmnEY- 028110, A OOBIPOMTION 01B OHIO.

amiss-unaware s ecimens; '0: mm: Potent.

Patented J an. 3, 1922.

Application .lled August 11,1918, Bcrlal 1570.818388 Renewed my 81, 1981. lerlal 170. 478,776.

To all 'wlwm itmay concern:

Be' it known that I, Rom-r P. CALLARD, a citizen of the United States of America,.and a resident of Charleston, West Virginia, have invented a new and useful Improve ment in Sheet-Glass-Drawing Mechanism, which invention isfully set forth in the let lowing specification.

This invention relates to the art of draw i sheet glass, and has for its object to prov1 e mechanism for continuous] drawing a sheet of glass, automaticall dividing it into e sections auto- My present inventionis ancimprovement on that shown, described and claimed in my apgplicatlon Sr. No. 308,970, ,filed July '7, 181 and is designed more partlcularly to snnpli the mechanism for transferring the severe sections of the sheetof glass to the annealing leer, to improve the construction of the chains whereby the sheet of glass is gripped and drawn, and certain other details ofoonstruction that will be hereinafter described.

For the purpose of illustrating one form sections, and delivering which the invention ma assume, reference.

is had to the accompanying drawings, which drawings, however, are for the pu ose of illustration only and not'for defining the limits of the invention, reference being had tothe ap ended claims for this purpose.

In sau drawi i I Fig. 1 is a cross-section of the upper por tion of the machine showing the forchcarth of the furnace, the drawing mechanism,-snd

the severing mechanism;

Fi 1' is a cross-sectional elevation show ing tie lower. portion of the machine, to-

gether with the entrance to the leer, the

means for operating the transfer device, and said device itself being shown in elevation F 2 is a rear elevation of the means for trans erring the severed sections of glass from the vertical to the horizontal and delivering the-same to the leer r0 ers;

Fi 3 Is an enlarged sectional detail show gngt e specific construction of said transfer evice- Fig.4 is adetail oftho drawing chains showing the specific construction of the gri pers thereon; r

. 1g. 5 is a detailed view showing how can] chains may be utilized for drawing the glass vertically upward instead of downwa as shown in Fig. 1; and

parts throughout the several Fig. 6 is a detail illustrating one means for mountin said chains for upward drawmg so that he same ma be advanced toward; or from the side of t e forehearth containing the molten glass.

Referring to the dra in which like reference numerals indies corresponding views, 1 is a glass-melting furnace provided with an o g 2 formed in the leottom thereof, which opening, as shown, is widest'at its top and tapers to a slot at its bottom, through which slot molten glass is permitted to flow during the drawmg operation. Said slot ma be closed by means of a l 3 when the evioe is not in operation. 1 plug 3, is provided with any suitablemeans for role the same. in order to-eflect e control of the flow ofmolten glass through the slot 2. Any suitable means, such for example as those shown in m aforesaid application, may be em loyed or controlling the temperature o the glass flowing through the slot 2, but as thesame form no part of the present invention they arenot herein illustrated. As the glass flows through the slot 2, it enters a chamber 4 which may. if desired be provided with burners or other suitahle means for controlling the temperature thereof. This chamber 4 constitutes an upward extension of the end 5 of the annealing leer. Immediately beneath the forehearth, and in the upper portion of the chamber 4, ispleceda pair of side holding rolls 6, (:1 on 1611 skillsl of the metwhine, .po

sitions as e edge por ions on v the sheet to ovg orh dme the narrowing tendency of the sheet. These rolls may be of any suitable construction, such for example as the knurled rolls shown in 111. previous application, and are to er in any suitable manner an driven y a shaft 7 orehearth of any suitable suitably gcaredto a moving part of the hanism and lowering.

the two pairs is identical, a description of one will sufiice for both. 8 is a power shaft mounted in chamber 4 and connected to an suitable source of ower. 9 is a second aft immediatel a ove and in alinement with shaft 8. aid shafts 8 and 9 are provided with sprocket wheels 10 and 11 over which passes the sprocket chain 12. 13 and 14 are shafts on the o osite side of the sheet of glass from the she s 9 and 10, provided with sprocket wheels 15 and 16 .over which passe a sprocket chain 17 Shaft 14 is geared to shaft 9 from which it follows that all of the shafts 8, 9, 13 and 14 are driven from the same power source. The erred form of construction of the chains is illustrated in detail in Fig. 4, wherein thelinlts 18 of the chains are shown as provided with grip members 19 to seize the e portions of the sheet and, as shown in 1, since the motion of the machine is sue as to direct the inner flights of the chains in a downward direction, they serve to draw the sheet vertically downward. If desired, the ipping devices at the outer edges of the set may be connected together by suitable connections extending entirel acres but out of contact with the face of t 0 sheet. The several shafts 8, 9, 13 and 14ers mounted in ieldable bearings 20 which may be adjusted in any suitable manner and the centers of the chains between th upper and lower sets of shafts are provi ed with adjustable bearin blocks 21 for the purpose of holding the inner flights of the 0 sins in intimate gripping contact with the sheet. The sprocket chain 22 extends from the shaft 9 to a. shaft 28 thro h which power is applied to the shaft 7 or driving the grigsrolls 6 6.

the glass emerges from between the ip chains, it is scored by any suitable scormg device 24. The s ecific construction of this scoring device orms no part of the present invention and therefore need not be specifically described herein. Preferably, it is of the construction shown and described Bussrd, Serial No. 270,323, file January 9, 1919, the same being an intermittently operating scoring device which, at stated intervals, effects a transverse score across one face of the sheet of glass. While the scoring device shown in said Busard application is preferred, any other suitable automatically operating scorinidevice ma be employed.

fter the g as passes the scoring device 24, it' asses between adjustable idle rolls 25, 25 and continues to descend until its lower edge contacts with a counter balanced lever 26 (F i 1) fulcrumed at 27 in an opening form in the wall of the chamber 5 and having an inner end 28 lprojecting into the path of the descending g ass. while the outer end is provided with an adjustable counterin U. S. ap 'lication by weight 29. This counterweight acts to ale vate the end 28 of the lever until contact is made between the lower edge 01 the descending sheet 30 and said lever, when the weight of the sheet acts to depress the lever. A pp 31 limits the upwar movement of the inwardly projecting end 28 of the lever '26 under the influence of the weight 29 when not in contact with the sheet 30.

Mounted in a bracket 32 on the framework of the machine and above the outwardly projecting arm .of the lever 26 is an electrical contact 33 which is connected by a suitable conductor 34 with the motor 35. The motor shwft 36 is connected by suitable gear-in with a shaft 37 which in turn is suitab -y geared to a cam shaftllS, on which shaft 38 are secured two cams would 40, the former being shown in full lines in Fig. 1 and the latter in dotted lines. These cams are in the form of time to receive and actuate suitable'rol ers in a well known manner.

Fulcrumed on a suitablestandard 41 is a lever 42 on one end of which is a roller 43 engaging in the cam groove 40. On the opposite end of the lever 42 from the roller 43, the lever 42 is provided with a sleeve 44, Fig. 2, sup rting a rigid metal pipe 45 projecti t rough an open slot 46 in the wall of s chamber 5. Mounted on this pipe 45 within the chamber 5 is a series of upwardly projecting 1 as 47, each of the pipes at its lower en ing in open communication with the pi 45. Each of the pipes 47 is provided with a series of openmgs 48, here shown as three, in each pipe, one near the top portion, one near the bottom portion, and one intermediate top and bottom. The specific construction of these openings is best shown in Fig. 8 in which the pipe 47 is shown as to chambers 49 in each of which an opening 48 is located, and surrounding said opcni is a flexible cup 50 of an siutable materi that will withstand the eat and efiect an airtight contact with the sheet of glass 30. Preferably, said cups 50 are formed of asbestos.

Referring again to Fig. .2, the extreme outer end 51 of the ipe 45 enters a valve chamber 52 in the orm of an elbow, to which chamber there is also connected it flexible pipe 53, which may be a'suitable hose, extending downward where it is suitably connected to a pigs 54 leading to an air exhaust of any sulta le construction, not shown. In the pipe 54 there is located a normally closed air valve 55 (Fig. 1). The construction of the whole is such that. when the air valve 55 is opened, the air is en hausted from the pipes 54. 53, 45 and 47. hence creating a suction through the openings 48. Each of the pipes 47 is provided with a ledge or bracket 36 (Fig. 1') for receivi the lower edge-portion of the sheet 0 glass 80 after it has depressed the lever 26, which lever projects between two of the pipes 47. Y

The pipe 45'can turn freely in the sleeve 44. R connected to the pipe 45 is a gidlsy crank arm- 7 (Fig. 1") which is connected by the device is started the stem of the valve 55 is depressed and the latter is o nod, thereby inaugurating suction throng the openings 48 in the pipes 47.

When the motor is set in motion by closing the contact 33 action of the sheet of glass m depressing the inner end 28 of the lever 26), the cam 40 sets to depress the end of the lever 42 hearing the s core 44 andwith it the pi e 45 and the pipes 47. At the some time t is suction valve 55 is opened and the cam 39 acts to rock the crank 57 so: as to 'turn the pipes 47 from an approximately vertical position to the horizontal position shown 1n dotted lines in Fig. 1. The hose '53 yields to permit the depressing action of the lever 42 and the glass is supported by the suction through, and theair-tight closure of the cops 50 until it reaches the'ho'riznntal position where the sheet of gle'ss is laid upon the leer rolls which are continuously moving and acting to advanccthe sheet into and tln'ou h the car. Just at'the instant that the sleet reaches the horizontal position, the suction valve '55 is closed bv the roller 64 passing-oil of-the ledge 63, the suction is broken in any'suit'a'ble manner, and the glass is iree. V p

As the sheet of glass passes ofi'ioi the end 28 of the lever 6, the colmtcriveight 29 brakes the electrical'conneotion 3 3 and this would etc the machine if means were not supplied or continuing the supply of current to themotor. For this purpose there is provided a normally open elcma'ieal'contact conveying current to the motor shown at 66. A spr ng-pressed-bell-crank'lever 67 has one arm controlling said contact and a second arm 63 is provided with a roller contacting with a lugor projection 69 on the face of the gear 62. When the motor is at rest, said lug 69. acting through the arm 68 of the lever, depresses the arm 67 and opens the commenter, as soon as (this beingdue to the sheet, the latter having 66ers open, the machine is at rest. When, however, the contact 33 is closed, the motor is started, the-roller asses on. of the lug 69 and the sheet of g ass asses of of the end 280i the lever 26. acts to open the contact 33 and close the contact 66 so thatccurrent continues .to pass to the motor. When the motor has made one complete revolutlon, the lug 69 again contacts with the roller 68, 0 one the contact 66, nnd the machine is rou ht to rest, any suitable electricall -contro ed brake mechanism bein provic ed to prevent overthrow. During tus complete revolution of the machine, the suction on s 50 have been brought into contact wi the face of the sheet of glass, the series of pipes 47have been lowered into horizontal position, the suction broken the sheet ofglassdelivered to tho leer rollers 65, and the parts returned from horizontal position to the osition shown in full lines in F 1, read to receive th next severed section of the sheet.

It will thus be seen that the vacuum carrier has a vertically reciprocat' movement and an oscillatin movement. he nocessity for the vertic y reciprocat' movement lies in the fact that, durin s time leer carrier the machine is continuously drawing and feeding a sheet of llass downward and, if the vacuum carrier ad only an oscillating movement, the upper portion of the carriercould'not get to e rear of the descended into its path. But, by combining the vertically reciprocating and oscillating movements, the carr er is enabled to deliver one section of the sheet of glass and return to its position to the rear of tho next descending section. To accom lishlthis purpose, the corn 'ooves 89 and are so constructed that t e first movement of the vacuum carrier from its normal practically upright position is an oscillating movement w ereby the suction is established and the section broken off. From this fpoint onward, the downward movement 0 the pi e thunder the influence ofthe lever 42 as place simultaneously with the oscilletin downward movement of the carrier. The sheet having been delivered to the leer carrier by the'vaoumn carrier. the latter is then turned from its horizontal to its upright position and the pipe 45" to agther wi j the carrier, is then elevated by a lever 42st: as to bring the up or end of thevacuum carrier to the rear 0'. the next descending section of glass and in position to receive shidsection and repeatthe operation.

It will be understood that there are two of the lovers 42, one supporting either end of the pipe 46, the second lever 42 not being shown at the right-hand side of Fig. 2, the

parts being broken away for compactness of sheet. into sections, a carrier receiving the illustration.

While in the portion glass drawing in s 1,.1 and from n fore mechanism, it will be a drawing molten glass in the oreh to draw the sheet upward construction is shown in chains 18' are shown with moving vertically upward cally ownward as in F 1, the so for holding the inner ts of the c in intimate contact with t shown in the When the are ing the glass vertic 20 may be mo ning on a track through the gear 72 to throu h the bevel shaft 32 and only that porti not designed to not and which has a or marred by the edge-holdin that the drawing chain are in no marring or injuring the the sheet surface.

What is claimed is: 1. In a sheet glass oscillating vs 6 carrier receivm from the machine in an upright depositing the same on a secon horizontal position.

2. In a sheet glass dra carrier, means delivering sec rrier, and suction the sections on the In a continuous sheet combination 0 prod ened glass to the ca chine, the 60 means, a ca sections, an same on the 4. In a sheet the combination as drawing a sheeto ocated above the said tubular carrier and a and. operated said sections rest when on t e carrier, means therefrom. Such for exhausting the air from the carrier tubes 5,in which the whereby suction is created to hold the glass oir inner flights on the carrier, and means automatically instead of vertibreaking said suction at a predetermined lports time.

nine 6. In a sheet glass drawing machine, an a sheet being here approximately form of bars 21.

thus used for drawautomatically shifting said carrier from upy upward. the same right to horizontal position with said secn a car (Fig. 6) run tions on the under side thereof, and suction power being applied devices holding the sections on the carrier the chains and damn the movement from upright to hori- 73 and 74 to the write. position 5 through w ich power is applied to T. In a continuous sheet glass drawing me- 25 the edge-holdin It will be 0 either one of the embodiments the edge portions of the sh portions are knurled or 30 the action of the ed and are out ofi from y means of the p be seen that I have prov simple form of carr er 35 severed sections of the sheet from mechanism to the leer of marring the line fire that the drawing mechan embodied in the drawing chains,

on of the sheet w g sections of severed sections, a leer, and suction devices lar form of sheetholding the sections on the carrier as the illustrated in Figs. latter transfers said sections to the leer.

sheet is drawn downward 5. In a sheet glass drawing machine, a hearth located above the drawing tubular carrier for receiving sectionspf the the drawn sheet, cups snrro mg openings in t which cups up ht tubular carrier recelvmg sections of e drawn sheet, means chine, a vertically movable normally upright rved that the chains in carrier, means imparting vertical movement n only to said carrier, means turning said carrier cse e from its upright to a horizontal position, honed throng means delivering sheet sections to said carll 6, 6, rier in its upright position, and suction dee finish she t. resent, invention it will during its movement from an upright to a ided an cflicient and horizontal position.

rring the 8. In a sheet lass drawing machine, the the rawvices holding said sections on said carrier combination wit a receptacle for molten without any danglass and a leer, of means for continuously finish of the sheet, drawing a sheet of glass, means severing tself, as tions of the shes therefrom during the drawing operation, a carrier transferring the ich it is sections as severed to the leer, and means have enter into the finished subjecting the sections to pneumatic pressure lreadv been roughto hold them on the carrier during the transrolls, so for movement.

anger of 9. In a. sheet glass drawing machine, a fire finish of vertically reciprocating carrier oscillating on its axis, means imparting said reciproeating and oscillating movements thereto,

drawing machine, an means delivering sections. of glass thereto, reciprocating vacuum and suction devices holding said sections the drawn glass on the carrier, and means in the sucposition and tion and freeing the said sections t \erefrom. d carrier in 10. In a shectglass drawing machine, the

combination of receptacle for molten glass machine, a fromwhich the glass flows in approximately trons of cheat sheet form ve loaliy downward, drawing devices holdmechanism gripping and drawing the sheet downward, scoring devices intermittently glassdrawing mascoring the drawnsheet, and suction means f sheet-severin for engaging and breaking oil the end sheet rrier for removing the severe section below the score, swinging the sheet d suction devices to hold the section over onto a horizontal leer conveyor,

and releasing the sectionso that it may pass lass drawing machine, into the leer. means for continuously 11. In a sheet glass drawing machine, the f glass, mes-n8 severing the combination of a receptacle for molten glass,

sheet drawing mechanism for gri ping and and a leer conveyor for carrying the sheet drawing a sheet from the receptae e, scoring into the leer when released by the suction devices for intermittently scoring the drawn devices. 10 shet to form succemive sheet sections, snc- In testimony whereof I have signed this 5 tion devices for engegin and breaking off specification.

the end sheet section an carrying it into position for delivery to a. horizontal leer, ROBERT P. (JALLARD. 

